Sunday night's 55th Grammy Awards is already jam-packed with a huge roster of talent that includes Justin Timberlake,
 Fun., Taylor Swift, Jack White, the Black Keys, Lumineers, Mumford & Sons, Carrie Underwood. Rihanna performing with Sting and Bruno Mars and Miranda Lambert jamming with Dierks Bentley.
But the show has just added a musical mashup that is sure to blow minds. In an explosive melding of rock, rap and EDM, a supergroup composed of Blink-182 drummer Travis Barker, Grammy host LL Cool J, Public Enemy leader Chuck D, Rage Against the Machine guitarist Tom Morello and DJ Z-Trip will get together for a special performance during the broadcast.

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At press time it was unknown what the theme of the performance would be.
Among the other acts recently added to the list of artist playing the show: Miguel with Wiz Khalifa, Hunter Hayes, Kelly Clarkson, the Grammy debut of Frank Ocean, the first-ever televised duet between nominee Ed Sheeran and Elton John, Maroon 5 and Alicia Keys.
John will also hook up with Zac Brown, the Alabama Shakes' Brittany Howard, Mumford, Mavis Staples and T-Bone Burnett to pay tribute to late Band drummer Levon Helm, who passed away in April.
Among the presenters at the show are: Ne-Yo, Foo Fighters leader Dave Grohl, Ryan Seacrest, Beyoncé, Hunter Hayes, Carly Rae Jepsen, Katy Perry, Kaley Cuoco, Neil Patrick Harris, Faith Hill, Jennifer Lopez, Tim McGraw, Pauley Perrette, Prince and Keith Urban.

http://www.mtv.com/news/articles/1701540/travis-barker-ll-cool-j-grammy-performance.jhtml